When is appropriate to use e-mail rather than the postal service to send a letter of complaint

Nowadays many companies have policies about paper use and electronic communications. In case of a letter of complain this probably will come in an e-mail communication instead of a physical communication like post mail service.  

Explanation:

Due to ecological reasons most of these communications are being sent in e-mail format.

answer: i feel like it would be group discussion

explanation:

the correct answer is c. he speculates on what might happen at given points in the future in a world without people. alan h. weisman is an american author, professor, and journalist. authors organize their information with a purpose. they present their ideas in an organized way. this is called text structure. weisman uses text structure so as to improve overall comprehension and to prove his points.